Improvement in machines foe tempering saws



5.0.ATKINS- MAGHINB VFOR TEMPERING. SAWS.

No. 62,591. PatentedMar. 5, 18157.A

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ELIAS C. ATKINS, OF INDIANAPOLISQINDIANA. Letters .Patent No. 62,591, dated .March 5, 1867.

IMPROVEMENT IN MACHINES FOR TBMPBRING' SAWS.

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4 TO ALL WI-IOM IT MAY CONCERN:

Be it known that I, ELIAsC. AT'KINs, of the city of Indianapolis, Warren county, and State of Indiana, have invented a. new and improved Machine for Tempering Saws; and I do hereby arm that the following is a. full and exact description thereof, referenccbeing had to the annexed drawings, making a part of this specification, in which'- i `Figure l is an elevation; and

'Figure 2 is a cross-section.

It has always been a matter of difficulty to construct plates of large size for tempering saws, on account of the tendency of such plates to spring and warp when subjected to heat. The object of my invention is to so construct the plates used as to lender it impossible to warp or spring them from a. true line upon the surface which is brought incontact with the steel plate in the processoftempering. This result is accomplished by constructing the tempering plates in parts, or of separate pieces of iron, as set forth in the accompanying drawings.

The machine consists of thc main uprights F F, cross-bai' E resting on sleeper J, the sliding-bar G, sections H. H H H H H, which are attached to cross-bar G by the bolts a a a a a a, chains D D, roller B, boxes CIC, lever A, staples b b, iig. I, and bed plate I, fig; 1. v

In operating, the sliding-bar-G is rst raised two to four inches, by means of the lever A actingl on the i'oller B, figs. 1 and 2, in which position the lower ends of the sections H andV the upper surface of the bed plate I are heated by means of a fire passing between them. This being accomplished, the saw or plate to be tempered is placedA in position upon the bed plate I, when the sliding-bar G, `with itsattachments, is gently lowered to 'Contact with it,bringing the saw or plate to a straight and level position, and retaining it in such position during the process of tempering. The sliding-bar G is held in perpendicular position by means of grooves, into which it passes at c c in the uprights F F.

The sections IIH H 'H H H, in combination with' the sliding-bar G and ,bed I, constructed andv operated substantially as set forth.

ELIAS C. ATKINS.

Witnesses:

O. M. SMITH, E.'H. WILLIAMS.4 

